#203D5D
Closest named color: Prussian Blue (#1D3557). oklch(35.4% 0.066 252.3), rgb(32, 61, 93).
Aa
White text reads best on this color (11.12:1).
About this color
#203D5D is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.066 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.027 away. White text reads best on it, at 11.12:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.88:1 |
| White text | 11.12:1 |
Values
| HEX | #203D5D |
| RGB | rgb(32, 61, 93) |
| HSL | hsl(211, 49%, 25%) |
| OKLCH | oklch(35.4% 0.066 252.3) |
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 #203D5D | 11.12:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #203D5D | 1.88:1 | Fails | Lc 8.3 | Not readable |
| #203D5D text on white | 11.12:1 | AAA | Lc 95.6 | Preferred for body text |
| #203D5D text on black | 1.88:1 | 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
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CDDBEB
oklch(88.6% 0.027 251.7)
-
Step 300
300
#AAC3E0
oklch(80.8% 0.049 252.3)
-
Step 400
400
#7DA4D1
oklch(70.7% 0.079 252.5)
-
Step 500
500
#5A8DC5
oklch(63.1% 0.101 251.8)
-
Step 600
600
#3F76B2
oklch(55.6% 0.111 252.2)
-
Step 700
700
#316399
oklch(49.1% 0.103 252.2)
-
Step 800
800
#29517C
oklch(42.7% 0.085 251.9)
-
Step 900
900 (this color)
#203D5D
oklch(35.4% 0.066 252.3)
-
Step 950
950
#17283A
oklch(27.1% 0.041 250.8)
#203D5D 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) | #2F3F5E | 0.021 |
| Deuteranopia (no green cones) | #27395C | 0.014 |
| Tritanopia (no blue cones) | #004448 | 0.054 |
| Achromatopsia (no color) | #3B3B3B | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #203D5D
#203D5D
oklch(35.4% 0.066 252.3)
- #50350D
#50350D
oklch(35.3% 0.066 72.6)
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 #203D5D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.028
- Dark Grey Blue #29465B ΔE 0.033
- Marine Blue #01386A ΔE 0.038
- Midnight Green #073B4C ΔE 0.038
- Charcoal #264653 ΔE 0.039
- Twilight Blue #0A437A ΔE 0.050
- Gunmetal #293241 ΔE 0.053
Use #203D5D 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.