#10404D
Closest named color: Midnight Green (#073B4C). oklch(34.6% 0.054 219.8), rgb(16, 64, 77).
Aa
White text reads best on this color (11.27:1).
About this color
#10404D is a dark, muted teal or cyan. In OKLCH its lightness is 35%, its chroma 0.054 and its hue 220°. 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 11.27:1.
| Hue family | Teals and cyans |
| Lightness | dark (35%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.86:1 |
| White text | 11.27:1 |
Values
| HEX | #10404D |
| RGB | rgb(16, 64, 77) |
| HSL | hsl(193, 66%, 18%) |
| OKLCH | oklch(34.6% 0.054 219.8) |
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 #10404D | 11.27:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #10404D | 1.86:1 | Fails | Lc 8.1 | Not readable |
| #10404D text on white | 11.27:1 | AAA | Lc 95.8 | Preferred for body text |
| #10404D text on black | 1.86:1 | 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
#CADDE4
oklch(88.5% 0.023 221.8)
-
Step 300
300
#A4C7D3
oklch(80.8% 0.041 220.6)
-
Step 400
400
#71ABBD
oklch(70.8% 0.066 219.4)
-
Step 500
500
#4895AC
oklch(63% 0.083 220.1)
-
Step 600
600
#227F98
oklch(55.5% 0.091 220.3)
-
Step 700
700
#126B82
oklch(49% 0.085 220.8)
-
Step 800
800
#145869
oklch(42.8% 0.07 218.9)
-
Step 900
900 (this color)
#10404D
oklch(34.6% 0.054 219.8)
-
Step 950
950
#112A32
oklch(26.9% 0.034 221.3)
#10404D 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) | #383E4E | 0.046 |
| Deuteranopia (no green cones) | #30384D | 0.041 |
| Tritanopia (no blue cones) | #004444 | 0.026 |
| Achromatopsia (no color) | #3B3B3B | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10404D
#10404D
oklch(34.6% 0.054 219.8)
- #522F23
#522F23
oklch(34.6% 0.056 39.6)
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 #10404D, 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 0.020
- Charcoal #264653 ΔE 0.031
- Dark Grey Blue #29465B ΔE 0.040
- Onyx #343A40 ΔE 0.043
- Dark Teal #014D4E ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.045
- Gunmetal #293241 ΔE 0.048
Use #10404D 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.