#124D99
Closest named color: Cobalt (#1E488F). oklch(43% 0.138 257.2), rgb(18, 77, 153).
Aa
White text reads best on this color (8.24:1).
About this color
#124D99 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.138 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.020 away. White text reads best on it, at 8.24:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.54:1 |
| White text | 8.24:1 |
Values
| HEX | #124D99 |
| RGB | rgb(18, 77, 153) |
| HSL | hsl(214, 79%, 34%) |
| OKLCH | oklch(43% 0.138 257.2) |
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 #124D99 | 8.24:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #124D99 | 2.54:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #124D99 text on white | 8.24:1 | AAA | Lc 87.9 | Fine for body text |
| #124D99 text on black | 2.54:1 | Fails | Lc -14.2 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF7
oklch(88.5% 0.044 256.8)
-
Step 300
300
#A0C3F5
oklch(80.9% 0.081 257.3)
-
Step 400
400
#6BA2F0
oklch(70.7% 0.129 257.2)
-
Step 500
500
#4188EB
oklch(63.1% 0.165 257.3)
-
Step 600
600
#1E70D9
oklch(55.7% 0.178 257.1)
-
Step 700
700
#0E5DBC
oklch(49.2% 0.166 257)
-
Step 800
800 (this color)
#124D99
oklch(43% 0.138 257.2)
-
Step 900
900
#174079
oklch(37.6% 0.107 257.5)
-
Step 950
950
#0F2647
oklch(27% 0.068 257.7)
#124D99 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) | #1F559C | 0.026 |
| Deuteranopia (no green cones) | #004998 | 0.015 |
| Tritanopia (no blue cones) | #005F6B | 0.104 |
| Achromatopsia (no color) | #4F4F4F | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #124D99
#124D99
oklch(43% 0.138 257.2)
- #6B4800
#6B4800
oklch(43% 0.09 77)
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 #124D99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.020
- Dusk Blue #26538D ΔE 0.032
- Light Navy #155084 ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.057
- Twilight Blue #0A437A ΔE 0.058
- Blueberry #464196 ΔE 0.058
- Sapphire #2138AB ΔE 0.060
Use #124D99 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.