#10404B
Closest named color: Midnight Green (#073B4C). oklch(34.5% 0.053 216.4), rgb(16, 64, 75).
Aa
White text reads best on this color (11.30:1).
About this color
#10404B is a dark, muted teal or cyan. In OKLCH its lightness is 35%, its chroma 0.053 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.019 away. White text reads best on it, at 11.30:1.
| Hue family | Teals and cyans |
| Lightness | dark (35%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.85:1 |
| White text | 11.30:1 |
Values
| HEX | #10404B |
| RGB | rgb(16, 64, 75) |
| HSL | hsl(191, 65%, 18%) |
| OKLCH | oklch(34.5% 0.053 216.4) |
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 #10404B | 11.30:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #10404B | 1.85:1 | Fails | Lc 8.0 | Not readable |
| #10404B text on white | 11.30:1 | AAA | Lc 95.8 | Preferred for body text |
| #10404B text on black | 1.85:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CADDE3
oklch(88.5% 0.022 218.6)
-
Step 300
300
#A5C8D1
oklch(81% 0.039 215.1)
-
Step 400
400
#72ABBA
oklch(70.7% 0.063 216.1)
-
Step 500
500
#4896A9
oklch(63.1% 0.081 215.9)
-
Step 600
600
#238095
oklch(55.7% 0.089 216.6)
-
Step 700
700
#136C7F
oklch(49.2% 0.082 216.6)
-
Step 800
800
#155867
oklch(42.7% 0.068 216.5)
-
Step 900
900 (this color)
#10404B
oklch(34.5% 0.053 216.4)
-
Step 950
950
#112B31
oklch(27.1% 0.034 214.8)
#10404B 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) | #393E4C | 0.047 |
| Deuteranopia (no green cones) | #30384B | 0.041 |
| Tritanopia (no blue cones) | #004443 | 0.024 |
| Achromatopsia (no color) | #3A3A3A | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10404B
#10404B
oklch(34.5% 0.053 216.4)
- #512F25
#512F25
oklch(34.5% 0.053 37.2)
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 #10404B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.019
- Dark Blue Grey #1F3B4D ΔE 0.021
- Charcoal #264653 ΔE 0.032
- Dark Grey Blue #29465B ΔE 0.042
- Onyx #343A40 ΔE 0.042
- Dark Teal #014D4E ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.048
- Gunmetal #293241 ΔE 0.048
Use #10404B 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.