#203B60
Closest named color: Prussian Blue (#1D3557). oklch(35% 0.073 256.7), rgb(32, 59, 96).
Aa
White text reads best on this color (11.31:1).
About this color
#203B60 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.073 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.023 away. White text reads best on it, at 11.31:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.85:1 |
| White text | 11.31:1 |
Values
| HEX | #203B60 |
| RGB | rgb(32, 59, 96) |
| HSL | hsl(215, 50%, 25%) |
| OKLCH | oklch(35% 0.073 256.7) |
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 #203B60 | 11.31:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #203B60 | 1.85:1 | Fails | Lc 7.9 | Not readable |
| #203B60 text on white | 11.31:1 | AAA | Lc 95.9 | Preferred for body text |
| #203B60 text on black | 1.85:1 | Fails | Lc 0.0 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEE
oklch(88.5% 0.031 258.9)
-
Step 300
300
#AAC3E4
oklch(81% 0.054 255.4)
-
Step 400
400
#7DA3D7
oklch(70.8% 0.087 256.4)
-
Step 500
500
#5C8BCC
oklch(63.1% 0.111 256.7)
-
Step 600
600
#4174B9
oklch(55.6% 0.121 256.5)
-
Step 700
700
#3361A0
oklch(49.2% 0.113 256.8)
-
Step 800
800
#2B4F81
oklch(42.6% 0.093 257)
-
Step 900
900 (this color)
#203B60
oklch(35% 0.073 256.7)
-
Step 950
950
#17273D
oklch(27% 0.047 256.6)
#203B60 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) | #2B3E62 | 0.018 |
| Deuteranopia (no green cones) | #22385F | 0.009 |
| Tritanopia (no blue cones) | #004349 | 0.059 |
| Achromatopsia (no color) | #3A3A3A | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #203B60
#203B60
oklch(35% 0.073 256.7)
- #503501
#503501
oklch(35.2% 0.073 77)
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 #203B60, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.023
- Marine Blue #01386A ΔE 0.031
- Dark Blue Grey #1F3B4D ΔE 0.034
- Dark Grey Blue #29465B ΔE 0.041
- Midnight Green #073B4C ΔE 0.043
- Twilight Blue #0A437A ΔE 0.047
- Charcoal #264653 ΔE 0.048
- Marine #042E60 ΔE 0.051
Use #203B60 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.