#25374F
Closest named color: Dark Blue Grey (#1F3B4D). oklch(33.3% 0.049 255.9), rgb(37, 55, 79).
Aa
White text reads best on this color (12.08:1).
About this color
#25374F is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.049 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.016 away. White text reads best on it, at 12.08:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.73:1 |
| White text | 12.08:1 |
Values
| HEX | #25374F |
| RGB | rgb(37, 55, 79) |
| HSL | hsl(214, 36%, 23%) |
| OKLCH | oklch(33.3% 0.049 255.9) |
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 #25374F | 12.08:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #25374F | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #25374F text on white | 12.08:1 | AAA | Lc 97.6 | Preferred for body text |
| #25374F text on black | 1.73:1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D1DAE7
oklch(88.5% 0.02 257.5)
-
Step 300
300
#B2C2D9
oklch(80.9% 0.037 257.4)
-
Step 400
400
#89A3C5
oklch(70.8% 0.058 255.3)
-
Step 500
500
#6B8CB7
oklch(63.2% 0.075 255.3)
-
Step 600
600
#5375A3
oklch(55.6% 0.082 256.2)
-
Step 700
700
#43628B
oklch(49% 0.076 255.7)
-
Step 800
800
#385071
oklch(42.7% 0.063 256.5)
-
Step 900
900 (this color)
#25374F
oklch(33.3% 0.049 255.9)
-
Step 950
950
#1C2735
oklch(26.9% 0.03 254.7)
#25374F 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) | #2E3850 | 0.014 |
| Deuteranopia (no green cones) | #29344E | 0.010 |
| Tritanopia (no blue cones) | #133C3F | 0.043 |
| Achromatopsia (no color) | #363636 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25374F
#25374F
oklch(33.3% 0.049 255.9)
- #453217
#453217
oklch(33.2% 0.049 74.3)
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 #25374F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.016
- Prussian Blue #1D3557 ΔE 0.020
- Gunmetal #293241 ΔE 0.026
- Midnight Green #073B4C ΔE 0.030
- Space Cadet #2B2D42 ΔE 0.035
- Onyx #343A40 ΔE 0.038
- Charcoal #264653 ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.050
Use #25374F 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.