#253F65
Closest named color: Dark Grey Blue (#29465B). oklch(36.6% 0.073 257.8), rgb(37, 63, 101).
Aa
White text reads best on this color (10.61:1).
About this color
#253F65 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.073 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.032 away. White text reads best on it, at 10.61:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.97:1 |
| White text | 10.61:1 |
Values
| HEX | #253F65 |
| RGB | rgb(37, 63, 101) |
| HSL | hsl(216, 46%, 27%) |
| OKLCH | oklch(36.6% 0.073 257.8) |
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 #253F65 | 10.61:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #253F65 | 1.97:1 | Fails | Lc 9.4 | Not readable |
| #253F65 text on white | 10.61:1 | AAA | Lc 94.5 | Preferred for body text |
| #253F65 text on black | 1.97:1 | Fails | Lc -8.1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEE
oklch(88.5% 0.031 258.9)
-
Step 300
300
#ABC2E5
oklch(80.9% 0.056 258.7)
-
Step 400
400
#7EA2D8
oklch(70.6% 0.089 258.3)
-
Step 500
500
#5D8ACD
oklch(63% 0.113 258.1)
-
Step 600
600
#4373BA
oklch(55.6% 0.123 258.1)
-
Step 700
700
#3460A0
oklch(49% 0.114 257.8)
-
Step 800
800
#2C4F82
oklch(42.7% 0.094 257.8)
-
Step 900
900 (this color)
#253F65
oklch(36.6% 0.073 257.8)
-
Step 950
950
#18273D
oklch(27.1% 0.046 257.8)
#253F65 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) | #2F4267 | 0.017 |
| Deuteranopia (no green cones) | #273C64 | 0.009 |
| Tritanopia (no blue cones) | #00484D | 0.064 |
| Achromatopsia (no color) | #3E3E3E | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #253F65
#253F65
oklch(36.6% 0.073 257.8)
- #543905
#543905
oklch(36.7% 0.073 77.5)
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 #253F65, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.032
- Twilight Blue #0A437A ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.039
- Marine Blue #01386A ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.043
- Charcoal #264653 ΔE 0.044
- Midnight Green #073B4C ΔE 0.054
- Onyx #343A40 ΔE 0.064
Use #253F65 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.