#203F89
Closest named color: Cobalt (#1E488F). oklch(39% 0.129 264.2), rgb(32, 63, 137).
Aa
White text reads best on this color (9.84:1).
About this color
#203F89 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.129 and its hue 264°. 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 9.84:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.13:1 |
| White text | 9.84:1 |
Values
| HEX | #203F89 |
| RGB | rgb(32, 63, 137) |
| HSL | hsl(222, 62%, 33%) |
| OKLCH | oklch(39% 0.129 264.2) |
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 #203F89 | 9.84:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #203F89 | 2.13:1 | Fails | Lc 11.5 | Not readable |
| #203F89 text on white | 9.84:1 | AAA | Lc 92.4 | Preferred for body text |
| #203F89 text on black | 2.13:1 | Fails | Lc -10.0 | 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 900.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFE
oklch(88.6% 0.054 263.2)
-
Step 300
300
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#709DFF
oklch(70.7% 0.152 264.2)
-
Step 500
500
#4A80FF
oklch(63.1% 0.198 264.2)
-
Step 600
600
#2F65EF
oklch(55.6% 0.216 264.2)
-
Step 700
700
#2253D0
oklch(49.2% 0.2 264)
-
Step 800
800
#1E45A8
oklch(42.8% 0.165 264.2)
-
Step 900
900 (this color)
#203F89
oklch(39% 0.129 264.2)
-
Step 950
950
#11234E
oklch(26.9% 0.083 264.4)
#203F89 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) | #0B488C | 0.026 |
| Deuteranopia (no green cones) | #003F88 | 0.020 |
| Tritanopia (no blue cones) | #00515D | 0.103 |
| Achromatopsia (no color) | #434343 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #203F89
#203F89
oklch(39% 0.129 264.2)
- #594100
#594100
oklch(39.1% 0.08 84.7)
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 #203F89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.026
- Twilight Blue #0A437A ΔE 0.033
- Light Navy #155084 ΔE 0.050
- Dark Slate Blue #483D8B ΔE 0.054
- Blueberry #464196 ΔE 0.056
- Dusk Blue #26538D ΔE 0.058
- Sapphire #2138AB ΔE 0.059
- Marine Blue #01386A ΔE 0.062
Use #203F89 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.