#3188E2
Closest named color: Dark Sky Blue (#448EE4). oklch(62% 0.159 252.6), rgb(49, 136, 226).
Aa
Black text reads best on this color (5.75:1).
About this color
#3188E2 is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.159 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.023 away. Black text reads best on it, at 5.75:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.75:1 |
| White text | 3.65:1 |
Values
| HEX | #3188E2 |
| RGB | rgb(49, 136, 226) |
| HSL | hsl(211, 75%, 54%) |
| OKLCH | oklch(62% 0.159 252.6) |
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 #3188E2 | 3.65:1 | AA large text | Lc -69.2 | Content text, not long reading |
| Black text on #3188E2 | 5.75:1 | AA | Lc 40.4 | Non-text elements, placeholder text |
| #3188E2 text on white | 3.65:1 | AA large text | Lc 63.7 | Content text, not long reading |
| #3188E2 text on black | 5.75:1 | AA | Lc -38.0 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C5DCF6
oklch(88.6% 0.044 251.5)
-
Step 300
300
#9DC4F2
oklch(80.8% 0.078 252.9)
-
Step 400
400
#65A4EC
oklch(70.7% 0.125 252.8)
-
Step 500
500 (this color)
#3188E2
oklch(62% 0.159 252.6)
-
Step 600
600
#0073D2
oklch(55.5% 0.17 252.7)
-
Step 700
700
#0061B2
oklch(49.2% 0.149 252.5)
-
Step 800
800
#004F93
oklch(42.7% 0.13 252.6)
-
Step 900
900
#0D4276
oklch(37.6% 0.103 252.5)
-
Step 950
950
#0B2745
oklch(26.9% 0.065 252.8)
#3188E2 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) | #5C8EE6 | 0.042 |
| Deuteranopia (no green cones) | #3F7EE0 | 0.026 |
| Tritanopia (no blue cones) | #009DAA | 0.118 |
| Achromatopsia (no color) | #868686 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3188E2
#3188E2
oklch(62% 0.159 252.6)
- #B67700
#B67700
oklch(62% 0.132 72.5)
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 #3188E2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.023
- Water Blue #0E87CC ΔE 0.038
- Chefchaouen Blue #4895EF ΔE 0.044
- Dodger Blue #1E90FF ΔE 0.045
- Soft Blue #6488EA ΔE 0.047
- Clear Blue #247AFD ΔE 0.059
- Cornflower Blue #6495ED ΔE 0.062
- Windows Blue #3778BF ΔE 0.063
Use #3188E2 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.