#004F90
Closest named color: Cobalt (#1E488F). oklch(42.5% 0.126 251.7), rgb(0, 79, 144).
Aa
White text reads best on this color (8.32:1).
About this color
#004F90 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.126 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.022 away. White text reads best on it, at 8.32:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.52:1 |
| White text | 8.32:1 |
Values
| HEX | #004F90 |
| RGB | rgb(0, 79, 144) |
| HSL | hsl(207, 100%, 28%) |
| OKLCH | oklch(42.5% 0.126 251.7) |
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 #004F90 | 8.32:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #004F90 | 2.52:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #004F90 text on white | 8.32:1 | AAA | Lc 88.1 | Fine for body text |
| #004F90 text on black | 2.52:1 | Fails | Lc -14.1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C6DCF4
oklch(88.6% 0.041 250.6)
-
Step 300
300
#9EC4EF
oklch(80.8% 0.074 251.8)
-
Step 400
400
#67A5E8
oklch(70.8% 0.118 251.5)
-
Step 500
500
#398CE1
oklch(63.1% 0.151 251.9)
-
Step 600
600
#0474CF
oklch(55.6% 0.164 251.9)
-
Step 700
700
#0061AF
oklch(49% 0.146 251.8)
-
Step 800
800 (this color)
#004F90
oklch(42.5% 0.126 251.7)
-
Step 900
900
#104373
oklch(37.7% 0.097 251.2)
-
Step 950
950
#0C2744
oklch(26.9% 0.063 252.6)
#004F90 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) | #2C5493 | 0.033 |
| Deuteranopia (no green cones) | #0C498F | 0.017 |
| Tritanopia (no blue cones) | #005F68 | 0.093 |
| Achromatopsia (no color) | #4E4E4E | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #004F90
#004F90
oklch(42.5% 0.126 251.7)
- #6D4400
#6D4400
oklch(42.4% 0.091 70.8)
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 #004F90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.022
- Light Navy #155084 ΔE 0.022
- Dusk Blue #26538D ΔE 0.026
- Deep Sea Blue #015482 ΔE 0.030
- Twilight Blue #0A437A ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.049
- Denim Blue #3B5B92 ΔE 0.059
- Blueberry #464196 ΔE 0.068
Use #004F90 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.