#2191EA
Closest named color: Dark Sky Blue (#448EE4). oklch(64.2% 0.163 248.7), rgb(33, 145, 234).
Aa
Black text reads best on this color (6.30:1).
About this color
#2191EA is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.163 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.020 away. Black text reads best on it, at 6.30:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.30:1 |
| White text | 3.33:1 |
Values
| HEX | #2191EA |
| RGB | rgb(33, 145, 234) |
| HSL | hsl(207, 83%, 52%) |
| OKLCH | oklch(64.2% 0.163 248.7) |
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 #2191EA | 3.33:1 | AA large text | Lc -65.6 | Content text, not long reading |
| Black text on #2191EA | 6.30:1 | AA | Lc 43.9 | Non-text elements, placeholder text |
| #2191EA text on white | 3.33:1 | AA large text | Lc 60.2 | Content text, not long reading |
| #2191EA text on black | 6.30:1 | AA | Lc -41.5 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DEECF9
oklch(93.6% 0.023 246)
-
Step 200
200
#C3DCF6
oklch(88.4% 0.045 249.4)
-
Step 300
300
#98C6F2
oklch(81% 0.079 247.7)
-
Step 400
400
#5BA6EC
oklch(70.7% 0.128 248.6)
-
Step 500
500 (this color)
#2191EA
oklch(64.2% 0.163 248.7)
-
Step 600
600
#0077C7
oklch(55.7% 0.152 248.5)
-
Step 700
700
#0064A8
oklch(49.2% 0.133 248.3)
-
Step 800
800
#00518B
oklch(42.6% 0.117 248.8)
-
Step 900
900
#004475
oklch(37.8% 0.103 248.3)
-
Step 950
950
#052845
oklch(27% 0.066 248.3)
#2191EA 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) | #6696EE | 0.055 |
| Deuteranopia (no green cones) | #4685E8 | 0.035 |
| Tritanopia (no blue cones) | #00A6B2 | 0.117 |
| Achromatopsia (no color) | #8D8D8D | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2191EA
#2191EA
oklch(64.2% 0.163 248.7)
- #C37A00
#C37A00
oklch(64.2% 0.14 68.6)
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 #2191EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.020
- Chefchaouen Blue #4895EF ΔE 0.028
- Dodger Blue #1E90FF ΔE 0.032
- Water Blue #0E87CC ΔE 0.051
- Soft Blue #6488EA ΔE 0.051
- Cornflower Blue #6495ED ΔE 0.052
- Clear Blue #247AFD ΔE 0.069
- Cool Blue #4984B8 ΔE 0.077
Use #2191EA 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.