#255374
Closest named color: Deep Sea Blue (#015482). oklch(42.6% 0.075 242.5), rgb(37, 83, 116).
Aa
White text reads best on this color (8.17:1).
About this color
#255374 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.075 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.028 away. White text reads best on it, at 8.17:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.56:1 |
| White text | 8.17:1 |
Values
| HEX | #255374 |
| RGB | rgb(37, 83, 116) |
| HSL | hsl(205, 52%, 30%) |
| OKLCH | oklch(42.6% 0.075 242.5) |
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 #255374 | 8.17:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #255374 | 2.56:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #255374 text on white | 8.17:1 | AAA | Lc 88.1 | Fine for body text |
| #255374 text on black | 2.56:1 | Fails | Lc -14.1 | 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 800.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDBE8
oklch(88.4% 0.024 244.2)
-
Step 300
300
#A9C5DB
oklch(81% 0.043 241.8)
-
Step 400
400
#7AA6C9
oklch(70.6% 0.07 242.9)
-
Step 500
500
#5690BB
oklch(63.1% 0.089 242.1)
-
Step 600
600
#3A79A7
oklch(55.5% 0.097 242.9)
-
Step 700
700
#2B668F
oklch(49.1% 0.09 242.2)
-
Step 800
800 (this color)
#255374
oklch(42.6% 0.075 242.5)
-
Step 900
900
#24455E
oklch(37.7% 0.058 243)
-
Step 950
950
#162937
oklch(27.2% 0.036 241.7)
#255374 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) | #445375 | 0.036 |
| Deuteranopia (no green cones) | #394C73 | 0.028 |
| Tritanopia (no blue cones) | #005B5E | 0.055 |
| Achromatopsia (no color) | #4F4F4F | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255374
#255374
oklch(42.6% 0.075 242.5)
- #6B451F
#6B451F
oklch(42.6% 0.074 63.4)
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 #255374, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.028
- Light Navy #155084 ΔE 0.032
- Light Navy Blue #2E5A88 ΔE 0.038
- YInMn Blue #415A77 ΔE 0.040
- Dusk Blue #26538D ΔE 0.042
- Petrol #005F6A ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.051
- Deep Teal #00555A ΔE 0.053
Use #255374 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.