#2188F9
Closest named color: Dodger Blue (#1E90FF). oklch(63.1% 0.191 254.9), rgb(33, 136, 249).
Aa
Black text reads best on this color (5.95:1).
About this color
#2188F9 is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.191 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.021 away. Black text reads best on it, at 5.95:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.191) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 5.95:1 |
| White text | 3.52:1 |
Values
| HEX | #2188F9 |
| RGB | rgb(33, 136, 249) |
| HSL | hsl(211, 95%, 55%) |
| OKLCH | oklch(63.1% 0.191 254.9) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #2188F9 | 3.52:1 | AA large text | Lc -67.7 | Content text, not long reading |
| Black text on #2188F9 | 5.95:1 | AA | Lc 41.8 | Non-text elements, placeholder text |
| #2188F9 text on white | 3.52:1 | AA large text | Lc 62.2 | Content text, not long reading |
| #2188F9 text on black | 5.95:1 | AA | Lc -39.5 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFC
oklch(93.5% 0.027 255.1)
-
Step 200
200
#C3DBFC
oklch(88.4% 0.052 256.4)
-
Step 300
300
#98C4FC
oklch(80.9% 0.093 254.7)
-
Step 400
400
#5BA2FB
oklch(70.6% 0.15 255.1)
-
Step 500
500 (this color)
#2188F9
oklch(63.1% 0.191 254.9)
-
Step 600
600
#0071DA
oklch(55.6% 0.182 254.8)
-
Step 700
700
#005EB9
oklch(49% 0.162 255.1)
-
Step 800
800
#004D99
oklch(42.7% 0.14 255)
-
Step 900
900
#004081
oklch(37.7% 0.124 254.9)
-
Step 950
950
#06264C
oklch(27% 0.079 255.4)
#2188F9 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #4992FD | 0.039 |
| Deuteranopia (no green cones) | #0580F7 | 0.024 |
| Tritanopia (no blue cones) | #00A3B4 | 0.143 |
| Achromatopsia (no color) | #888888 | 0.191 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2188F9
#2188F9
oklch(63.1% 0.191 254.9)
- #B87C00
#B87C00
oklch(63.2% 0.133 75.1)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #2188F9, closest first.
No curated palette has a color within ΔE 0.04 of #2188F9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.021
- Clear Blue #247AFD ΔE 0.036
- Dark Sky Blue #448EE4 ΔE 0.043
- Chefchaouen Blue #4895EF ΔE 0.049
- Soft Blue #6488EA ΔE 0.055
- Cornflower #6A79F7 ΔE 0.065
- Cornflower Blue #6495ED ΔE 0.068
- Water Blue #0E87CC ΔE 0.069
Use #2188F9 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.