#23639B
Closest named color: Peacock Blue (#016795). oklch(48.7% 0.111 248.7), rgb(35, 99, 155).
Aa
White text reads best on this color (6.30:1).
About this color
#23639B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.111 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.021 away. White text reads best on it, at 6.30:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.32:1 |
| White text | 6.30:1 |
Values
| HEX | #23639B |
| RGB | rgb(35, 99, 155) |
| HSL | hsl(208, 63%, 37%) |
| OKLCH | oklch(48.7% 0.111 248.7) |
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 #23639B | 6.30:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #23639B | 3.32:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #23639B text on white | 6.30:1 | AA | Lc 81.1 | Fine for body text |
| #23639B text on black | 3.32:1 | AA large text | Lc -20.8 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A6C4E2
oklch(80.8% 0.054 248.5)
-
Step 400
400
#76A5D4
oklch(70.6% 0.086 249.1)
-
Step 500
500
#508EC9
oklch(63.1% 0.11 248.9)
-
Step 600
600
#3277B5
oklch(55.5% 0.119 248.8)
-
Step 700
700 (this color)
#23639B
oklch(48.7% 0.111 248.7)
-
Step 800
800
#20527F
oklch(42.8% 0.092 248.8)
-
Step 900
900
#204466
oklch(37.7% 0.072 249.1)
-
Step 950
950
#14283C
oklch(27.1% 0.046 249.9)
#23639B 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) | #49669D | 0.039 |
| Deuteranopia (no green cones) | #375B9A | 0.026 |
| Tritanopia (no blue cones) | #007077 | 0.081 |
| Achromatopsia (no color) | #606060 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23639B
#23639B
oklch(48.7% 0.111 248.7)
- #865200
#865200
oklch(48.7% 0.107 68.3)
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 #23639B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.021
- Denim Blue #3B5B92 ΔE 0.029
- Denim #3B638C ΔE 0.030
- Dusky Blue #475F94 ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.036
- Ocean Blue #03719C ΔE 0.041
- Mid Blue #276AB3 ΔE 0.041
- French Blue #436BAD ΔE 0.048
Use #23639B 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.