#203F5A
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.7% 0.06 246.7), rgb(32, 63, 90).
Aa
White text reads best on this color (10.93:1).
About this color
#203F5A is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.060 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.024 away. White text reads best on it, at 10.93:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.92:1 |
| White text | 10.93:1 |
Values
| HEX | #203F5A |
| RGB | rgb(32, 63, 90) |
| HSL | hsl(208, 48%, 24%) |
| OKLCH | oklch(35.7% 0.06 246.7) |
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 #203F5A | 10.93:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #203F5A | 1.92:1 | Fails | Lc 8.7 | Not readable |
| #203F5A text on white | 10.93:1 | AAA | Lc 95.2 | Preferred for body text |
| #203F5A text on black | 1.92:1 | Fails | Lc -7.5 | 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
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDBE9
oklch(88.4% 0.025 246.2)
-
Step 300
300
#AAC4DD
oklch(80.9% 0.045 247.3)
-
Step 400
400
#7CA5CB
oklch(70.6% 0.072 246.9)
-
Step 500
500
#598FBE
oklch(63.2% 0.092 246.2)
-
Step 600
600
#3D78AA
oklch(55.6% 0.1 246.4)
-
Step 700
700
#2F6592
oklch(49.1% 0.092 246.3)
-
Step 800
800
#285277
oklch(42.6% 0.078 247.4)
-
Step 900
900 (this color)
#203F5A
oklch(35.7% 0.06 246.7)
-
Step 950
950
#162838
oklch(26.9% 0.038 246.6)
#203F5A 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) | #33405B | 0.025 |
| Deuteranopia (no green cones) | #2C3A59 | 0.020 |
| Tritanopia (no blue cones) | #004548 | 0.048 |
| Achromatopsia (no color) | #3D3D3D | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #203F5A
#203F5A
oklch(35.7% 0.06 246.7)
- #513617
#513617
oklch(35.7% 0.059 67.6)
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 #203F5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.024
- Dark Grey Blue #29465B ΔE 0.026
- Charcoal #264653 ΔE 0.030
- Prussian Blue #1D3557 ΔE 0.033
- Midnight Green #073B4C ΔE 0.035
- Marine Blue #01386A ΔE 0.046
- Onyx #343A40 ΔE 0.048
- Gunmetal #293241 ΔE 0.052
Use #203F5A 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.