#203D4D
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34.5% 0.045 234.3), rgb(32, 61, 77).
Aa
White text reads best on this color (11.43:1).
About this color
#203D4D is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.045 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.007 away. White text reads best on it, at 11.43:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.83:1 |
| White text | 11.43:1 |
Values
| HEX | #203D4D |
| RGB | rgb(32, 61, 77) |
| HSL | hsl(201, 41%, 21%) |
| OKLCH | oklch(34.5% 0.045 234.3) |
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 #203D4D | 11.43:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #203D4D | 1.83:1 | Fails | Lc 7.6 | Not readable |
| #203D4D text on white | 11.43:1 | AAA | Lc 96.3 | Preferred for body text |
| #203D4D text on black | 1.83:1 | 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
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CEDBE4
oklch(88.4% 0.019 237.8)
-
Step 300
300
#ACC5D3
oklch(80.9% 0.034 232.3)
-
Step 400
400
#80A7BD
oklch(70.8% 0.053 233.2)
-
Step 500
500
#5F91AD
oklch(63.2% 0.068 233.9)
-
Step 600
600
#447B99
oklch(55.7% 0.075 234.2)
-
Step 700
700
#356782
oklch(49.1% 0.069 234.2)
-
Step 800
800
#2D546A
oklch(42.7% 0.057 235)
-
Step 900
900 (this color)
#203D4D
oklch(34.5% 0.045 234.3)
-
Step 950
950
#182932
oklch(27% 0.028 232.3)
#203D4D 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) | #353C4E | 0.028 |
| Deuteranopia (no green cones) | #2F384D | 0.024 |
| Tritanopia (no blue cones) | #044142 | 0.035 |
| Achromatopsia (no color) | #3A3A3A | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #203D4D
#203D4D
oklch(34.5% 0.045 234.3)
- #4B3322
#4B3322
oklch(34.5% 0.044 56)
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 #203D4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.007
- Midnight Green #073B4C ΔE 0.022
- Charcoal #264653 ΔE 0.031
- Onyx #343A40 ΔE 0.032
- Prussian Blue #1D3557 ΔE 0.036
- Gunmetal #293241 ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.047
Use #203D4D 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.