#12557D
Closest named color: Deep Sea Blue (#015482). oklch(43% 0.092 241), rgb(18, 85, 125).
Aa
White text reads best on this color (8.01:1).
About this color
#12557D is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.092 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.011 away. White text reads best on it, at 8.01:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.62:1 |
| White text | 8.01:1 |
Values
| HEX | #12557D |
| RGB | rgb(18, 85, 125) |
| HSL | hsl(202, 75%, 28%) |
| OKLCH | oklch(43% 0.092 241) |
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 #12557D | 8.01:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #12557D | 2.62:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #12557D text on white | 8.01:1 | AAA | Lc 87.4 | Fine for body text |
| #12557D text on black | 2.62:1 | Fails | Lc -14.7 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF3
oklch(93.5% 0.015 241.8)
-
Step 200
200
#C9DCEB
oklch(88.5% 0.029 241.6)
-
Step 300
300
#A3C6E0
oklch(81% 0.053 240.5)
-
Step 400
400
#6EA8D1
oklch(70.7% 0.085 240.3)
-
Step 500
500
#4491C5
oklch(63.1% 0.109 241.1)
-
Step 600
600
#1D7AB2
oklch(55.5% 0.119 241.4)
-
Step 700
700
#0C6799
oklch(49.1% 0.11 241)
-
Step 800
800 (this color)
#12557D
oklch(43% 0.092 241)
-
Step 900
900
#184664
oklch(37.8% 0.071 241.1)
-
Step 950
950
#10293A
oklch(27% 0.044 240.8)
#12557D 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) | #42567F | 0.045 |
| Deuteranopia (no green cones) | #334C7C | 0.035 |
| Tritanopia (no blue cones) | #005F63 | 0.062 |
| Achromatopsia (no color) | #505050 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12557D
#12557D
oklch(43% 0.092 241)
- #73420F
#73420F
oklch(42.9% 0.091 60.9)
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 #12557D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.011
- Light Navy #155084 ΔE 0.021
- Dusk Blue #26538D ΔE 0.032
- Light Navy Blue #2E5A88 ΔE 0.033
- YInMn Blue #415A77 ΔE 0.048
- Petrol #005F6A ΔE 0.051
- Cobalt #1E488F ΔE 0.053
- Denim Blue #3B5B92 ΔE 0.054
Use #12557D 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.