#388FCA
Closest named color: Water Blue (#0E87CC). oklch(62.4% 0.121 242.2), rgb(56, 143, 202).
Aa
Black text reads best on this color (5.94:1).
About this color
#388FCA is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.121 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.032 away. Black text reads best on it, at 5.94:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.94:1 |
| White text | 3.52:1 |
Values
| HEX | #388FCA |
| RGB | rgb(56, 143, 202) |
| HSL | hsl(204, 58%, 51%) |
| OKLCH | oklch(62.4% 0.121 242.2) |
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 #388FCA | 3.52:1 | AA large text | Lc -68.0 | Content text, not long reading |
| Black text on #388FCA | 5.94:1 | AA | Lc 41.5 | Non-text elements, placeholder text |
| #388FCA text on white | 3.52:1 | AA large text | Lc 62.5 | Content text, not long reading |
| #388FCA text on black | 5.94:1 | AA | Lc -39.1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C7DCEE
oklch(88.4% 0.034 244)
-
Step 300
300
#A0C6E4
oklch(80.9% 0.059 242.2)
-
Step 400
400
#69A8D7
oklch(70.8% 0.095 242.1)
-
Step 500
500 (this color)
#388FCA
oklch(62.4% 0.121 242.2)
-
Step 600
600
#037AB9
oklch(55.6% 0.132 242.3)
-
Step 700
700
#00679D
oklch(49.2% 0.117 242)
-
Step 800
800
#015481
oklch(42.7% 0.101 242)
-
Step 900
900
#114668
oklch(37.8% 0.079 242.1)
-
Step 950
950
#0D293D
oklch(27% 0.05 242.9)
#388FCA 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) | #7490CD | 0.059 |
| Deuteranopia (no green cones) | #6082C9 | 0.046 |
| Tritanopia (no blue cones) | #009EA4 | 0.085 |
| Achromatopsia (no color) | #888888 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #388FCA
#388FCA
oklch(62.4% 0.121 242.2)
- #BB752E
#BB752E
oklch(62.5% 0.122 62.2)
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 #388FCA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.032
- Cool Blue #4984B8 ΔE 0.036
- Dark Sky Blue #448EE4 ΔE 0.042
- Faded Blue #658CBB ΔE 0.043
- Steel Blue #4682B4 ΔE 0.043
- Blue NCS #118AB2 ΔE 0.044
- Off Blue #5684AE ΔE 0.048
- Dusty Blue #5A86AD ΔE 0.049
Use #388FCA 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.