#253F4B
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.2% 0.038 229), rgb(37, 63, 75).
Aa
White text reads best on this color (11.10:1).
About this color
#253F4B is a dark, muted teal or cyan. In OKLCH its lightness is 35%, its chroma 0.038 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.017 away. White text reads best on it, at 11.10:1.
| Hue family | Teals and cyans |
| Lightness | dark (35%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.89:1 |
| White text | 11.10:1 |
Values
| HEX | #253F4B |
| RGB | rgb(37, 63, 75) |
| HSL | hsl(199, 34%, 22%) |
| OKLCH | oklch(35.2% 0.038 229) |
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 #253F4B | 11.10:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #253F4B | 1.89:1 | Fails | Lc 8.3 | Not readable |
| #253F4B text on white | 11.10:1 | AAA | Lc 95.6 | Preferred for body text |
| #253F4B text on black | 1.89:1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CFDBE2
oklch(88.4% 0.016 233)
-
Step 300
300
#AFC5D0
oklch(81% 0.029 229.3)
-
Step 400
400
#84A7B8
oklch(70.8% 0.046 229.1)
-
Step 500
500
#6491A6
oklch(63.2% 0.058 228.8)
-
Step 600
600
#4A7B91
oklch(55.7% 0.063 228.5)
-
Step 700
700
#3B677C
oklch(49.1% 0.059 230.3)
-
Step 800
800
#315464
oklch(42.6% 0.048 228.9)
-
Step 900
900 (this color)
#253F4B
oklch(35.2% 0.038 229)
-
Step 950
950
#1A2930
oklch(27.1% 0.024 228.7)
#253F4B 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) | #393E4C | 0.028 |
| Deuteranopia (no green cones) | #333A4B | 0.024 |
| Tritanopia (no blue cones) | #144243 | 0.026 |
| Achromatopsia (no color) | #3C3C3C | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #253F4B
#253F4B
oklch(35.2% 0.038 229)
- #4C3529
#4C3529
oklch(35.2% 0.039 48.6)
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 #253F4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.017
- Charcoal #264653 ΔE 0.024
- Onyx #343A40 ΔE 0.027
- Midnight Green #073B4C ΔE 0.031
- Dark Grey Blue #29465B ΔE 0.033
- Charcoal Grey #3C4142 ΔE 0.037
- Gunmetal #293241 ΔE 0.042
- Prussian Blue #1D3557 ΔE 0.046
Use #253F4B 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.