#388FFB
Closest named color: Dodger Blue (#1E90FF). oklch(65.3% 0.181 255.8), rgb(56, 143, 251).
Aa
Black text reads best on this color (6.49:1).
About this color
#388FFB is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.181 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.013 away. Black text reads best on it, at 6.49:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.49:1 |
| White text | 3.23:1 |
Values
| HEX | #388FFB |
| RGB | rgb(56, 143, 251) |
| HSL | hsl(213, 96%, 60%) |
| OKLCH | oklch(65.3% 0.181 255.8) |
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 #388FFB | 3.23:1 | AA large text | Lc -64.6 | Content text, not long reading |
| Black text on #388FFB | 6.49:1 | AA | Lc 44.9 | Non-text elements, placeholder text |
| #388FFB text on white | 3.23:1 | AA large text | Lc 59.2 | Large or bold text, headings |
| #388FFB text on black | 6.49:1 | AA | Lc -42.6 | 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
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C4DBFA
oklch(88.4% 0.05 255.9)
-
Step 300
300
#9BC3F9
oklch(80.8% 0.088 256.1)
-
Step 400
400
#62A2F7
oklch(70.7% 0.142 256.1)
-
Step 500
500 (this color)
#388FFB
oklch(65.3% 0.181 255.8)
-
Step 600
600
#0070DE
oklch(55.7% 0.188 255.7)
-
Step 700
700
#005DBC
oklch(49% 0.167 256)
-
Step 800
800
#004C9C
oklch(42.7% 0.146 256)
-
Step 900
900
#0A407E
oklch(37.7% 0.118 255.8)
-
Step 950
950
#09264A
oklch(27% 0.075 255.8)
#388FFB 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) | #5898FF | 0.038 |
| Deuteranopia (no green cones) | #3187F9 | 0.022 |
| Tritanopia (no blue cones) | #00A9B9 | 0.138 |
| Achromatopsia (no color) | #8F8F8F | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #388FFB
#388FFB
oklch(65.3% 0.181 255.8)
- #BF8200
#BF8200
oklch(65.2% 0.137 75.8)
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 #388FFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.013
- Chefchaouen Blue #4895EF ΔE 0.029
- Dark Sky Blue #448EE4 ΔE 0.034
- Soft Blue #6488EA ΔE 0.044
- Cornflower Blue #6495ED ΔE 0.048
- Clear Blue #247AFD ΔE 0.058
- Cornflower #6A79F7 ΔE 0.065
- Water Blue #0E87CC ΔE 0.077
Use #388FFB 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.