#203F4F
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.1% 0.046 232.7), rgb(32, 63, 79).
Aa
White text reads best on this color (11.13:1).
About this color
#203F4F is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.046 and its hue 233°. 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 11.13:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.88:1 |
| White text | 11.13:1 |
Values
| HEX | #203F4F |
| RGB | rgb(32, 63, 79) |
| HSL | hsl(200, 42%, 22%) |
| OKLCH | oklch(35.1% 0.046 232.7) |
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 #203F4F | 11.13:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #203F4F | 1.88:1 | Fails | Lc 8.3 | Not readable |
| #203F4F text on white | 11.13:1 | AAA | Lc 95.6 | Preferred for body text |
| #203F4F 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#ABC5D4
oklch(80.9% 0.035 233.2)
-
Step 400
400
#7EA7BE
oklch(70.7% 0.056 233.1)
-
Step 500
500
#5C91AD
oklch(63% 0.07 232.5)
-
Step 600
600
#407B99
oklch(55.6% 0.077 232.6)
-
Step 700
700
#326883
oklch(49.2% 0.072 232.5)
-
Step 800
800
#2A556A
oklch(42.8% 0.059 231.6)
-
Step 900
900 (this color)
#203F4F
oklch(35.1% 0.046 232.7)
-
Step 950
950
#172932
oklch(27% 0.029 231)
#203F4F 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) | #373E50 | 0.031 |
| Deuteranopia (no green cones) | #31394F | 0.028 |
| Tritanopia (no blue cones) | #014344 | 0.035 |
| Achromatopsia (no color) | #3B3B3B | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #203F4F
#203F4F
oklch(35.1% 0.046 232.7)
- #4E3424
#4E3424
oklch(35.1% 0.046 52.3)
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 #203F4F, 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
- Charcoal #264653 ΔE 0.025
- Midnight Green #073B4C ΔE 0.026
- Dark Grey Blue #29465B ΔE 0.031
- Onyx #343A40 ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.040
- Gunmetal #293241 ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.045
Use #203F4F 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.