#124C8B
Closest named color: Cobalt (#1E488F). oklch(41.7% 0.119 254.3), rgb(18, 76, 139).
Aa
White text reads best on this color (8.63:1).
About this color
#124C8B is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.119 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.015 away. White text reads best on it, at 8.63:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.43:1 |
| White text | 8.63:1 |
Values
| HEX | #124C8B |
| RGB | rgb(18, 76, 139) |
| HSL | hsl(211, 77%, 31%) |
| OKLCH | oklch(41.7% 0.119 254.3) |
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 #124C8B | 8.63:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #124C8B | 2.43:1 | Fails | Lc 14.8 | Not readable |
| #124C8B text on white | 8.63:1 | AAA | Lc 89.2 | Fine for body text |
| #124C8B text on black | 2.43:1 | Fails | Lc -13.0 | 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 800.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A2C4EE
oklch(81% 0.07 253.9)
-
Step 400
400
#6FA4E5
oklch(70.8% 0.111 254.2)
-
Step 500
500
#468BDD
oklch(63.1% 0.142 254.3)
-
Step 600
600
#2473CB
oklch(55.5% 0.155 254.4)
-
Step 700
700
#1560B0
oklch(49.1% 0.145 254.4)
-
Step 800
800 (this color)
#124C8B
oklch(41.7% 0.119 254.3)
-
Step 900
900
#194271
oklch(37.6% 0.093 254)
-
Step 950
950
#102742
oklch(27% 0.058 253.9)
#124C8B 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) | #2B518D | 0.026 |
| Deuteranopia (no green cones) | #11478A | 0.015 |
| Tritanopia (no blue cones) | #005B64 | 0.090 |
| Achromatopsia (no color) | #4C4C4C | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #124C8B
#124C8B
oklch(41.7% 0.119 254.3)
- #684400
#684400
oklch(41.7% 0.088 74.8)
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 #124C8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.015
- Light Navy #155084 ΔE 0.018
- Dusk Blue #26538D ΔE 0.027
- Deep Sea Blue #015482 ΔE 0.030
- Twilight Blue #0A437A ΔE 0.038
- Light Navy Blue #2E5A88 ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.062
- Blueberry #464196 ΔE 0.063
Use #124C8B 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.