#3B88E4
Closest named color: Dark Sky Blue (#448EE4). oklch(62.4% 0.158 254.8), rgb(59, 136, 228).
Aa
Black text reads best on this color (5.82:1).
About this color
#3B88E4 is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.158 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.019 away. Black text reads best on it, at 5.82:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.82:1 |
| White text | 3.60:1 |
Values
| HEX | #3B88E4 |
| RGB | rgb(59, 136, 228) |
| HSL | hsl(213, 76%, 56%) |
| OKLCH | oklch(62.4% 0.158 254.8) |
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 #3B88E4 | 3.60:1 | AA large text | Lc -68.7 | Content text, not long reading |
| Black text on #3B88E4 | 5.82:1 | AA | Lc 40.8 | Non-text elements, placeholder text |
| #3B88E4 text on white | 3.60:1 | AA large text | Lc 63.2 | Content text, not long reading |
| #3B88E4 text on black | 5.82:1 | AA | Lc -38.4 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#9FC4F2
oklch(81% 0.077 254.1)
-
Step 400
400
#69A3EC
oklch(70.6% 0.124 254.8)
-
Step 500
500 (this color)
#3B88E4
oklch(62.4% 0.158 254.8)
-
Step 600
600
#1472D4
oklch(55.6% 0.171 254.6)
-
Step 700
700
#015FB8
oklch(49.2% 0.159 254.7)
-
Step 800
800
#0A4E95
oklch(42.7% 0.132 254.7)
-
Step 900
900
#144177
oklch(37.6% 0.104 255.3)
-
Step 950
950
#0D2745
oklch(27% 0.064 254)
#3B88E4 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) | #5C8FE8 | 0.037 |
| Deuteranopia (no green cones) | #4080E2 | 0.021 |
| Tritanopia (no blue cones) | #009EAB | 0.122 |
| Achromatopsia (no color) | #878787 | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B88E4
#3B88E4
oklch(62.4% 0.158 254.8)
- #B57A00
#B57A00
oklch(62.5% 0.132 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 #3B88E4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.019
- Chefchaouen Blue #4895EF ΔE 0.040
- Soft Blue #6488EA ΔE 0.040
- Dodger Blue #1E90FF ΔE 0.043
- Water Blue #0E87CC ΔE 0.044
- Cornflower Blue #6495ED ΔE 0.056
- Clear Blue #247AFD ΔE 0.058
- Cornflower #6A79F7 ΔE 0.066
Use #3B88E4 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.