#204A9B
Closest named color: Cobalt (#1E488F). oklch(42.8% 0.141 261.8), rgb(32, 74, 155).
Aa
White text reads best on this color (8.35:1).
About this color
#204A9B is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.141 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.020 away. White text reads best on it, at 8.35:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.51:1 |
| White text | 8.35:1 |
Values
| HEX | #204A9B |
| RGB | rgb(32, 74, 155) |
| HSL | hsl(220, 66%, 37%) |
| OKLCH | oklch(42.8% 0.141 261.8) |
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 #204A9B | 8.35:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #204A9B | 2.51:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #204A9B text on white | 8.35:1 | AAA | Lc 88.4 | Fine for body text |
| #204A9B text on black | 2.51:1 | Fails | Lc -13.8 | Not readable |
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 800.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C9DAF8
oklch(88.5% 0.045 261.9)
-
Step 300
300
#A4C1F6
oklch(80.8% 0.082 262.3)
-
Step 400
400
#729FF2
oklch(70.6% 0.132 261.9)
-
Step 500
500
#4E85EE
oklch(63.1% 0.168 261.9)
-
Step 600
600
#326CDC
oklch(55.6% 0.182 261.8)
-
Step 700
700
#2559BF
oklch(49.1% 0.17 262)
-
Step 800
800 (this color)
#204A9B
oklch(42.8% 0.141 261.8)
-
Step 900
900
#1F3E7B
oklch(37.6% 0.11 262.2)
-
Step 950
950
#132548
oklch(27% 0.069 262.3)
#204A9B 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) | #14549E | 0.027 |
| Deuteranopia (no green cones) | #004899 | 0.019 |
| Tritanopia (no blue cones) | #005E6B | 0.111 |
| Achromatopsia (no color) | #4E4E4E | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #204A9B
#204A9B
oklch(42.8% 0.141 261.8)
- #674900
#674900
oklch(42.7% 0.088 81.6)
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 #204A9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.020
- Dusk Blue #26538D ΔE 0.037
- Light Navy #155084 ΔE 0.045
- Blueberry #464196 ΔE 0.048
- Sapphire #2138AB ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.056
- Dark Slate Blue #483D8B ΔE 0.059
- Twilight Blue #0A437A ΔE 0.061
Use #204A9B 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.