#00499B
Closest named color: Cobalt (#1E488F). oklch(41.9% 0.148 256.9), rgb(0, 73, 155).
Aa
White text reads best on this color (8.65:1).
About this color
#00499B is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.148 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.023 away. White text reads best on it, at 8.65:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.42:1 |
| White text | 8.65:1 |
Values
| HEX | #00499B |
| RGB | rgb(0, 73, 155) |
| HSL | hsl(212, 100%, 30%) |
| OKLCH | oklch(41.9% 0.148 256.9) |
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 #00499B | 8.65:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #00499B | 2.42:1 | Fails | Lc 15.0 | Dividers and decoration only |
| #00499B text on white | 8.65:1 | AAA | Lc 88.9 | Fine for body text |
| #00499B text on black | 2.42:1 | Fails | Lc -13.3 | 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
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBF9
oklch(88.5% 0.048 256.2)
-
Step 300
300
#9DC3F9
oklch(80.9% 0.087 257.2)
-
Step 400
400
#66A2F5
oklch(70.7% 0.137 256.8)
-
Step 500
500
#3888F2
oklch(63.2% 0.177 256.8)
-
Step 600
600
#086EE0
oklch(55.5% 0.192 256.9)
-
Step 700
700
#005CC0
oklch(49.1% 0.174 256.9)
-
Step 800
800 (this color)
#00499B
oklch(41.9% 0.148 256.9)
-
Step 900
900
#10407D
oklch(37.7% 0.115 256.7)
-
Step 950
950
#0C2649
oklch(27% 0.072 256.9)
#00499B 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) | #0A529E | 0.026 |
| Deuteranopia (no green cones) | #004599 | 0.011 |
| Tritanopia (no blue cones) | #005D6B | 0.110 |
| Achromatopsia (no color) | #4C4C4C | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00499B
#00499B
oklch(41.9% 0.148 256.9)
- #674500
#674500
oklch(41.8% 0.088 76.8)
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 #00499B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.023
- Dusk Blue #26538D ΔE 0.046
- Light Navy #155084 ΔE 0.046
- Sapphire #2138AB ΔE 0.049
- Twilight Blue #0A437A ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.056
- Blueberry #464196 ΔE 0.063
- Light Navy Blue #2E5A88 ΔE 0.071
Use #00499B 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.