#00429C
Closest named color: Cobalt (#1E488F). oklch(40.4% 0.158 259.2), rgb(0, 66, 156).
Aa
White text reads best on this color (9.29:1).
About this color
#00429C is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.158 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.033 away. White text reads best on it, at 9.29:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.25:1 |
| White text | 9.29:1 |
Values
| HEX | #00429C |
| RGB | rgb(0, 66, 156) |
| HSL | hsl(215, 100%, 31%) |
| OKLCH | oklch(40.4% 0.158 259.2) |
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 #00429C | 9.29:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #00429C | 2.25:1 | Fails | Lc 13.4 | Not readable |
| #00429C text on white | 9.29:1 | AAA | Lc 90.6 | Preferred for body text |
| #00429C text on black | 2.25:1 | Fails | Lc -11.7 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFC
oklch(88.6% 0.051 258.4)
-
Step 300
300
#9DC2FD
oklch(80.9% 0.093 259.6)
-
Step 400
400
#66A0FC
oklch(70.7% 0.149 259.3)
-
Step 500
500
#3A85F9
oklch(63.1% 0.189 259.1)
-
Step 600
600
#126BE8
oklch(55.6% 0.205 259.1)
-
Step 700
700
#0158CA
oklch(49.1% 0.191 259.2)
-
Step 800
800 (this color)
#00429C
oklch(40.4% 0.158 259.2)
-
Step 900
900
#123E82
oklch(37.7% 0.124 259.3)
-
Step 950
950
#0C254C
oklch(27% 0.079 259.2)
#00429C 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) | #004E9F | 0.033 |
| Deuteranopia (no green cones) | #00419A | 0.004 |
| Tritanopia (no blue cones) | #005968 | 0.120 |
| Achromatopsia (no color) | #474747 | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00429C
#00429C
oklch(40.4% 0.158 259.2)
- #614200
#614200
oklch(40.4% 0.084 78.4)
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 #00429C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.033
- Sapphire #2138AB ΔE 0.036
- Twilight Blue #0A437A ΔE 0.057
- Light Navy #155084 ΔE 0.061
- Dusk Blue #26538D ΔE 0.063
- Blueberry #464196 ΔE 0.066
- Deep Sea Blue #015482 ΔE 0.071
- Blue Blue #2242C7 ΔE 0.073
Use #00429C 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.