#204C9E
Closest named color: Cobalt (#1E488F). oklch(43.5% 0.142 261.4), rgb(32, 76, 158).
Aa
White text reads best on this color (8.11:1).
About this color
#204C9E is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.142 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.026 away. White text reads best on it, at 8.11:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.58:1 |
| White text | 8.11:1 |
Values
| HEX | #204C9E |
| RGB | rgb(32, 76, 158) |
| HSL | hsl(219, 66%, 37%) |
| OKLCH | oklch(43.5% 0.142 261.4) |
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 #204C9E | 8.11:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #204C9E | 2.58:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #204C9E text on white | 8.11:1 | AAA | Lc 87.6 | Fine for body text |
| #204C9E text on black | 2.58:1 | Fails | Lc -14.5 | 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
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAF8
oklch(88.4% 0.046 260.7)
-
Step 300
300
#A3C1F7
oklch(80.8% 0.084 262)
-
Step 400
400
#71A0F3
oklch(70.8% 0.132 261.2)
-
Step 500
500
#4C85EF
oklch(63.1% 0.17 261.6)
-
Step 600
600
#2F6CDD
oklch(55.6% 0.184 261.4)
-
Step 700
700
#2259C0
oklch(49% 0.172 261.5)
-
Step 800
800 (this color)
#204C9E
oklch(43.5% 0.142 261.4)
-
Step 900
900
#1E3E7B
oklch(37.6% 0.111 261.8)
-
Step 950
950
#122548
oklch(27% 0.07 261.5)
#204C9E 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) | #1656A1 | 0.027 |
| Deuteranopia (no green cones) | #004A9C | 0.019 |
| Tritanopia (no blue cones) | #00606D | 0.112 |
| Achromatopsia (no color) | #505050 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #204C9E
#204C9E
oklch(43.5% 0.142 261.4)
- #6A4B00
#6A4B00
oklch(43.5% 0.09 81.3)
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 #204C9E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.026
- Dusk Blue #26538D ΔE 0.037
- Light Navy #155084 ΔE 0.047
- Blueberry #464196 ΔE 0.050
- Sapphire #2138AB ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.057
- Denim Blue #3B5B92 ΔE 0.059
- Light Navy Blue #2E5A88 ΔE 0.061
Use #204C9E 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.