#10403D
Closest named color: Midnight Green (#073B4C). oklch(33.9% 0.05 189.1), rgb(16, 64, 61).
Aa
White text reads best on this color (11.52:1).
About this color
#10403D is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.050 and its hue 189°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.037 away. White text reads best on it, at 11.52:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.82:1 |
| White text | 11.52:1 |
Values
| HEX | #10403D |
| RGB | rgb(16, 64, 61) |
| HSL | hsl(176, 60%, 16%) |
| OKLCH | oklch(33.9% 0.05 189.1) |
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 #10403D | 11.52:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #10403D | 1.82:1 | Fails | Lc 7.6 | Not readable |
| #10403D text on white | 11.52:1 | AAA | Lc 96.3 | Preferred for body text |
| #10403D text on black | 1.82:1 | 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#CADEDC
oklch(88.5% 0.022 189.5)
-
Step 300
300
#A6C9C5
oklch(80.9% 0.038 187.9)
-
Step 400
400
#74ADA8
oklch(70.7% 0.06 189)
-
Step 500
500
#4B9993
oklch(63.2% 0.078 188.8)
-
Step 600
600
#27837D
oklch(55.6% 0.084 188.7)
-
Step 700
700
#186F6A
oklch(49.2% 0.078 189.1)
-
Step 800
800
#185A56
oklch(42.6% 0.065 189.1)
-
Step 900
900 (this color)
#10403D
oklch(33.9% 0.05 189.1)
-
Step 950
950
#122B2A
oklch(26.9% 0.031 192.1)
#10403D 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) | #3C3C3D | 0.054 |
| Deuteranopia (no green cones) | #35373D | 0.050 |
| Tritanopia (no blue cones) | #00423F | 0.009 |
| Achromatopsia (no color) | #393939 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10403D
#10403D
oklch(33.9% 0.05 189.1)
- #4E2C32
#4E2C32
oklch(33.8% 0.051 8.7)
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 #10403D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.037
- Dark Blue Grey #1F3B4D ΔE 0.041
- Dark Teal #014D4E ΔE 0.045
- Onyx #343A40 ΔE 0.046
- Evergreen #05472A ΔE 0.047
- Charcoal #264653 ΔE 0.047
- Charcoal Grey #3C4142 ΔE 0.054
- Gunmetal #293241 ΔE 0.055
Use #10403D 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.