#004057
Closest named color: Midnight Green (#073B4C). oklch(34.8% 0.069 230.1), rgb(0, 64, 87).
Aa
White text reads best on this color (11.22:1).
About this color
#004057 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.069 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.022 away. White text reads best on it, at 11.22:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.87:1 |
| White text | 11.22:1 |
Values
| HEX | #004057 |
| RGB | rgb(0, 64, 87) |
| HSL | hsl(196, 100%, 17%) |
| OKLCH | oklch(34.8% 0.069 230.1) |
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 #004057 | 11.22:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #004057 | 1.87:1 | Fails | Lc 8.4 | Not readable |
| #004057 text on white | 11.22:1 | AAA | Lc 95.5 | Preferred for body text |
| #004057 text on black | 1.87:1 | Fails | Lc 0.0 | 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 900.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF2
oklch(93.6% 0.015 229)
-
Step 200
200
#C7DDE9
oklch(88.5% 0.029 231.5)
-
Step 300
300
#9FC8DC
oklch(81% 0.052 229.2)
-
Step 400
400
#67ABCB
oklch(70.8% 0.083 229.8)
-
Step 500
500
#3595BD
oklch(63.1% 0.106 229.8)
-
Step 600
600
#007EA7
oklch(55.5% 0.111 230)
-
Step 700
700
#006A8D
oklch(49.1% 0.098 229.8)
-
Step 800
800
#005774
oklch(42.7% 0.085 229.4)
-
Step 900
900 (this color)
#004057
oklch(34.8% 0.069 230.1)
-
Step 950
950
#0B2A38
oklch(27% 0.044 231.3)
#004057 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) | #343F58 | 0.047 |
| Deuteranopia (no green cones) | #293857 | 0.039 |
| Tritanopia (no blue cones) | #004648 | 0.038 |
| Achromatopsia (no color) | #3B3B3B | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #004057
#004057
oklch(34.8% 0.069 230.1)
- #562E15
#562E15
oklch(34.8% 0.069 50.6)
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 #004057, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.022
- Dark Blue Grey #1F3B4D ΔE 0.026
- Charcoal #264653 ΔE 0.038
- Prussian Blue #1D3557 ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.040
- Marine Blue #01386A ΔE 0.046
- Dark Teal #014D4E ΔE 0.051
- Gunmetal #293241 ΔE 0.057
Use #004057 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.