#25404F
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.7% 0.042 234), rgb(37, 64, 79).
Aa
White text reads best on this color (10.90:1).
About this color
#25404F is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.042 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.019 away. White text reads best on it, at 10.90:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.92:1 |
| White text | 10.90:1 |
Values
| HEX | #25404F |
| RGB | rgb(37, 64, 79) |
| HSL | hsl(201, 36%, 23%) |
| OKLCH | oklch(35.7% 0.042 234) |
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 #25404F | 10.90:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #25404F | 1.92:1 | Fails | Lc 8.7 | Not readable |
| #25404F text on white | 10.90:1 | AAA | Lc 95.2 | Preferred for body text |
| #25404F 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CEDBE3
oklch(88.4% 0.018 234.5)
-
Step 300
300
#AEC5D2
oklch(81% 0.031 232.5)
-
Step 400
400
#82A6BC
oklch(70.6% 0.051 235.3)
-
Step 500
500
#6290AB
oklch(63.1% 0.064 234.9)
-
Step 600
600
#477A96
oklch(55.5% 0.07 234)
-
Step 700
700
#386780
oklch(49.1% 0.065 233.5)
-
Step 800
800
#2F5468
oklch(42.7% 0.054 233.6)
-
Step 900
900 (this color)
#25404F
oklch(35.7% 0.042 234)
-
Step 950
950
#192932
oklch(27.1% 0.027 233.8)
#25404F 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) | #393F50 | 0.028 |
| Deuteranopia (no green cones) | #333B4F | 0.023 |
| Tritanopia (no blue cones) | #104445 | 0.032 |
| Achromatopsia (no color) | #3D3D3D | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25404F
#25404F
oklch(35.7% 0.042 234)
- #4E3627
#4E3627
oklch(35.6% 0.042 52.9)
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 #25404F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.019
- Charcoal #264653 ΔE 0.020
- Dark Grey Blue #29465B ΔE 0.026
- Onyx #343A40 ΔE 0.031
- Midnight Green #073B4C ΔE 0.033
- Charcoal Grey #3C4142 ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.044
- Gunmetal #293241 ΔE 0.046
Use #25404F 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.