#203E55
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.2% 0.054 243.3), rgb(32, 62, 85).
Aa
White text reads best on this color (11.16:1).
About this color
#203E55 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.054 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.016 away. White text reads best on it, at 11.16:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.88:1 |
| White text | 11.16:1 |
Values
| HEX | #203E55 |
| RGB | rgb(32, 62, 85) |
| HSL | hsl(206, 45%, 23%) |
| OKLCH | oklch(35.2% 0.054 243.3) |
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 #203E55 | 11.16:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #203E55 | 1.88:1 | Fails | Lc 8.2 | Not readable |
| #203E55 text on white | 11.16:1 | AAA | Lc 95.7 | Preferred for body text |
| #203E55 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CDDBE7
oklch(88.4% 0.022 243.8)
-
Step 300
300
#ABC4D9
oklch(80.8% 0.04 243.6)
-
Step 400
400
#7EA6C6
oklch(70.8% 0.064 242.9)
-
Step 500
500
#5C8FB8
oklch(63.1% 0.083 243.9)
-
Step 600
600
#4079A4
oklch(55.6% 0.09 243.2)
-
Step 700
700
#32668D
oklch(49.2% 0.084 243.4)
-
Step 800
800
#2A5372
oklch(42.7% 0.069 243.3)
-
Step 900
900 (this color)
#203E55
oklch(35.2% 0.054 243.3)
-
Step 950
950
#172836
oklch(26.9% 0.035 244.4)
#203E55 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) | #343E56 | 0.026 |
| Deuteranopia (no green cones) | #2D3955 | 0.021 |
| Tritanopia (no blue cones) | #004446 | 0.044 |
| Achromatopsia (no color) | #3B3B3B | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #203E55
#203E55
oklch(35.2% 0.054 243.3)
- #4F341B
#4F341B
oklch(35.1% 0.054 62.3)
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 #203E55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.016
- Midnight Green #073B4C ΔE 0.029
- Charcoal #264653 ΔE 0.030
- Dark Grey Blue #29465B ΔE 0.030
- Prussian Blue #1D3557 ΔE 0.031
- Onyx #343A40 ΔE 0.041
- Gunmetal #293241 ΔE 0.045
- Marine Blue #01386A ΔE 0.050
Use #203E55 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.