#203E4A
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34.6% 0.041 226), rgb(32, 62, 74).
Aa
White text reads best on this color (11.35:1).
About this color
#203E4A is a dark, muted teal or cyan. In OKLCH its lightness is 35%, its chroma 0.041 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.013 away. White text reads best on it, at 11.35:1.
| Hue family | Teals and cyans |
| Lightness | dark (35%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.84:1 |
| White text | 11.35:1 |
Values
| HEX | #203E4A |
| RGB | rgb(32, 62, 74) |
| HSL | hsl(197, 40%, 21%) |
| OKLCH | oklch(34.6% 0.041 226) |
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 #203E4A | 11.35:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #203E4A | 1.84:1 | Fails | Lc 7.8 | Not readable |
| #203E4A text on white | 11.35:1 | AAA | Lc 96.1 | Preferred for body text |
| #203E4A text on black | 1.84:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CEDCE2
oklch(88.6% 0.017 225.2)
-
Step 300
300
#ACC5D0
oklch(80.8% 0.031 226.1)
-
Step 400
400
#80A8B9
oklch(70.8% 0.05 225.9)
-
Step 500
500
#5E92A7
oklch(63.1% 0.064 225.5)
-
Step 600
600
#437C92
oklch(55.6% 0.069 225.3)
-
Step 700
700
#34687D
oklch(49% 0.065 226.7)
-
Step 800
800
#2C5565
oklch(42.7% 0.053 225.6)
-
Step 900
900 (this color)
#203E4A
oklch(34.6% 0.041 226)
-
Step 950
950
#182930
oklch(26.9% 0.026 225.8)
#203E4A 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) | #383D4B | 0.033 |
| Deuteranopia (no green cones) | #31384A | 0.028 |
| Tritanopia (no blue cones) | #074242 | 0.029 |
| Achromatopsia (no color) | #3A3A3A | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #203E4A
#203E4A
oklch(34.6% 0.041 226)
- #4C3327
#4C3327
oklch(34.7% 0.042 46.5)
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 #203E4A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.013
- Midnight Green #073B4C ΔE 0.024
- Charcoal #264653 ΔE 0.029
- Onyx #343A40 ΔE 0.030
- Dark Grey Blue #29465B ΔE 0.038
- Gunmetal #293241 ΔE 0.039
- Charcoal Grey #3C4142 ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.043
Use #203E4A 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.