#0F429E
Closest named color: Sapphire (#2138AB). oklch(40.9% 0.159 261.3), rgb(15, 66, 158).
Aa
White text reads best on this color (9.15:1).
About this color
#0F429E is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.159 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.032 away. White text reads best on it, at 9.15:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.29:1 |
| White text | 9.15:1 |
Values
| HEX | #0F429E |
| RGB | rgb(15, 66, 158) |
| HSL | hsl(219, 83%, 34%) |
| OKLCH | oklch(40.9% 0.159 261.3) |
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 #0F429E | 9.15:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #0F429E | 2.29:1 | Fails | Lc 13.6 | Not readable |
| #0F429E text on white | 9.15:1 | AAA | Lc 90.4 | Preferred for body text |
| #0F429E text on black | 2.29:1 | Fails | Lc -11.9 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFC
oklch(93.5% 0.027 262.3)
-
Step 200
200
#C6DAFC
oklch(88.4% 0.052 261.1)
-
Step 300
300
#9FC1FD
oklch(80.8% 0.093 261.6)
-
Step 400
400
#6B9FFC
oklch(70.7% 0.148 261.3)
-
Step 500
500
#4283FA
oklch(63% 0.19 261.3)
-
Step 600
600
#2369E9
oklch(55.6% 0.206 261.3)
-
Step 700
700
#1656CB
oklch(49% 0.193 261.4)
-
Step 800
800 (this color)
#0F429E
oklch(40.9% 0.159 261.3)
-
Step 900
900
#183D82
oklch(37.7% 0.124 261.4)
-
Step 950
950
#0F244C
oklch(26.9% 0.079 261.8)
#0F429E 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) | #004FA1 | 0.034 |
| Deuteranopia (no green cones) | #00429C | 0.007 |
| Tritanopia (no blue cones) | #005969 | 0.121 |
| Achromatopsia (no color) | #484848 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F429E
#0F429E
oklch(40.9% 0.159 261.3)
- #614400
#614400
oklch(40.8% 0.084 80.9)
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 #0F429E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.032
- Cobalt #1E488F ΔE 0.033
- Blueberry #464196 ΔE 0.060
- Twilight Blue #0A437A ΔE 0.061
- Light Navy #155084 ΔE 0.062
- Dusk Blue #26538D ΔE 0.062
- Blue Blue #2242C7 ΔE 0.068
- Dark Slate Blue #483D8B ΔE 0.070
Use #0F429E 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.