#04374F
Closest named color: Midnight Green (#073B4C). oklch(31.9% 0.065 235.7), rgb(4, 55, 79).
Aa
White text reads best on this color (12.61:1).
About this color
#04374F is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.065 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.016 away. White text reads best on it, at 12.61:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.66:1 |
| White text | 12.61:1 |
Values
| HEX | #04374F |
| RGB | rgb(4, 55, 79) |
| HSL | hsl(199, 90%, 16%) |
| OKLCH | oklch(31.9% 0.065 235.7) |
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 #04374F | 12.61:1 | AAA | Lc -101.7 | Preferred for body text |
| Black text on #04374F | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #04374F text on white | 12.61:1 | AAA | Lc 98.2 | Preferred for body text |
| #04374F text on black | 1.66:1 | 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 950.
-
Step 50
50
#EFF7FC
oklch(97.2% 0.011 234.8)
-
Step 100
100
#DCEDF7
oklch(93.6% 0.023 233.4)
-
Step 200
200
#BFDEF2
oklch(88.4% 0.043 236.3)
-
Step 300
300
#8FC9EC
oklch(80.9% 0.078 235.5)
-
Step 400
400
#44ACE3
oklch(70.8% 0.124 235.6)
-
Step 500
500
#0094CF
oklch(63% 0.135 235.8)
-
Step 600
600
#007DAF
oklch(55.7% 0.119 235.4)
-
Step 700
700
#006994
oklch(49.2% 0.105 235.5)
-
Step 800
800
#00567A
oklch(42.8% 0.091 235.4)
-
Step 900
900
#004766
oklch(37.6% 0.081 235.8)
-
Step 950
950 (this color)
#04374F
oklch(31.9% 0.065 235.7)
#04374F 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) | #2B3750 | 0.038 |
| Deuteranopia (no green cones) | #21304F | 0.031 |
| Tritanopia (no blue cones) | #003D3F | 0.041 |
| Achromatopsia (no color) | #333333 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04374F
#04374F
oklch(31.9% 0.065 235.7)
- #4B280D
#4B280D
oklch(31.7% 0.065 55)
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 #04374F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.016
- Prussian Blue #1D3557 ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.028
- Gunmetal #293241 ΔE 0.041
- Marine #042E60 ΔE 0.046
- Marine Blue #01386A ΔE 0.048
- Space Cadet #2B2D42 ΔE 0.048
- Onyx #343A40 ΔE 0.059
Use #04374F 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.