#388ACD
Closest named color: Water Blue (#0E87CC). oklch(61.4% 0.129 246.7), rgb(56, 138, 205).
Aa
Black text reads best on this color (5.68:1).
About this color
#388ACD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.129 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.022 away. Black text reads best on it, at 5.68:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.68:1 |
| White text | 3.69:1 |
Values
| HEX | #388ACD |
| RGB | rgb(56, 138, 205) |
| HSL | hsl(207, 60%, 51%) |
| OKLCH | oklch(61.4% 0.129 246.7) |
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 #388ACD | 3.69:1 | AA large text | Lc -69.7 | Content text, not long reading |
| Black text on #388ACD | 5.68:1 | AA | Lc 39.9 | Non-text elements, placeholder text |
| #388ACD text on white | 3.69:1 | AA large text | Lc 64.2 | Content text, not long reading |
| #388ACD text on black | 5.68:1 | AA | Lc -37.5 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C7DCF0
oklch(88.5% 0.036 246.9)
-
Step 300
300
#A0C5E8
oklch(80.9% 0.064 247.2)
-
Step 400
400
#6AA6DC
oklch(70.6% 0.101 246.9)
-
Step 500
500 (this color)
#388ACD
oklch(61.4% 0.129 246.7)
-
Step 600
600
#1078C0
oklch(55.6% 0.14 246.8)
-
Step 700
700
#0065A5
oklch(49.2% 0.128 246.7)
-
Step 800
800
#075286
oklch(42.6% 0.108 246.9)
-
Step 900
900
#13456B
oklch(37.8% 0.083 245.9)
-
Step 950
950
#0E283F
oklch(26.9% 0.054 248)
#388ACD 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) | #6B8DD0 | 0.051 |
| Deuteranopia (no green cones) | #567FCC | 0.036 |
| Tritanopia (no blue cones) | #009AA2 | 0.094 |
| Achromatopsia (no color) | #858585 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #388ACD
#388ACD
oklch(61.4% 0.129 246.7)
- #B77317
#B77317
oklch(61.5% 0.129 67.1)
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 #388ACD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.022
- Cool Blue #4984B8 ΔE 0.033
- Dark Sky Blue #448EE4 ΔE 0.037
- Steel Blue #4682B4 ΔE 0.040
- Blue NCS #118AB2 ΔE 0.048
- Faded Blue #658CBB ΔE 0.049
- Off Blue #5684AE ΔE 0.050
- Windows Blue #3778BF ΔE 0.051
Use #388ACD 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.