#124EA8
Closest named color: Cobalt (#1E488F). oklch(44.4% 0.157 259.3), rgb(18, 78, 168).
Aa
White text reads best on this color (7.83:1).
About this color
#124EA8 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.157 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.042 away. White text reads best on it, at 7.83:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.68:1 |
| White text | 7.83:1 |
Values
| HEX | #124EA8 |
| RGB | rgb(18, 78, 168) |
| HSL | hsl(216, 81%, 36%) |
| OKLCH | oklch(44.4% 0.157 259.3) |
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 #124EA8 | 7.83:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #124EA8 | 2.68:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #124EA8 text on white | 7.83:1 | AAA | Lc 86.6 | Fine for body text |
| #124EA8 text on black | 2.68:1 | Fails | Lc -15.5 | Dividers and decoration only |
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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DBFB
oklch(88.6% 0.05 258.7)
-
Step 300
300
#9DC2FC
oklch(80.8% 0.092 259.2)
-
Step 400
400
#67A0FB
oklch(70.7% 0.147 259.4)
-
Step 500
500
#3C85F8
oklch(63.1% 0.187 259.3)
-
Step 600
600
#166BE7
oklch(55.6% 0.203 259.3)
-
Step 700
700
#0558C9
oklch(49% 0.19 259.4)
-
Step 800
800 (this color)
#124EA8
oklch(44.4% 0.157 259.3)
-
Step 900
900
#133E81
oklch(37.6% 0.123 259.4)
-
Step 950
950
#0D254B
oklch(27% 0.077 259.3)
#124EA8 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) | #0359AB | 0.029 |
| Deuteranopia (no green cones) | #004CA6 | 0.010 |
| Tritanopia (no blue cones) | #006473 | 0.119 |
| Achromatopsia (no color) | #525252 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #124EA8
#124EA8
oklch(44.4% 0.157 259.3)
- #6E4C00
#6E4C00
oklch(44.2% 0.092 79.1)
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 #124EA8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.042
- Dusk Blue #26538D ΔE 0.050
- Sapphire #2138AB ΔE 0.052
- Blue Blue #2242C7 ΔE 0.057
- Light Navy #155084 ΔE 0.060
- Blueberry #464196 ΔE 0.062
- Denim Blue #3B5B92 ΔE 0.067
- Deep Sea Blue #015482 ΔE 0.068
Use #124EA8 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.