#103F3B
Closest named color: Midnight Green (#073B4C). oklch(33.5% 0.05 187), rgb(16, 63, 59).
Aa
White text reads best on this color (11.69:1).
About this color
#103F3B is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.050 and its hue 187°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.038 away. White text reads best on it, at 11.69:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.79:1 |
| White text | 11.69:1 |
Values
| HEX | #103F3B |
| RGB | rgb(16, 63, 59) |
| HSL | hsl(175, 59%, 15%) |
| OKLCH | oklch(33.5% 0.05 187) |
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 #103F3B | 11.69:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #103F3B | 1.79:1 | Fails | Lc 0.0 | Not readable |
| #103F3B text on white | 11.69:1 | AAA | Lc 96.6 | Preferred for body text |
| #103F3B text on black | 1.79:1 | 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
#CBDEDB
oklch(88.6% 0.021 185.4)
-
Step 300
300
#A6C9C4
oklch(80.9% 0.038 185.9)
-
Step 400
400
#74ADA7
oklch(70.7% 0.06 187.6)
-
Step 500
500
#4C9991
oklch(63.2% 0.077 186.5)
-
Step 600
600
#2A837B
oklch(55.6% 0.083 186.5)
-
Step 700
700
#1A6F68
oklch(49.2% 0.078 186.7)
-
Step 800
800
#1A5A55
oklch(42.6% 0.064 187.6)
-
Step 900
900 (this color)
#103F3B
oklch(33.5% 0.05 187)
-
Step 950
950
#122B29
oklch(26.8% 0.031 188.7)
#103F3B 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) | #3B3B3B | 0.053 |
| Deuteranopia (no green cones) | #34363B | 0.050 |
| Tritanopia (no blue cones) | #00413E | 0.009 |
| Achromatopsia (no color) | #383838 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #103F3B
#103F3B
oklch(33.5% 0.05 187)
- #4D2B32
#4D2B32
oklch(33.5% 0.051 6.9)
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 #103F3B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.038
- Dark Blue Grey #1F3B4D ΔE 0.042
- Onyx #343A40 ΔE 0.046
- Evergreen #05472A ΔE 0.047
- Dark Teal #014D4E ΔE 0.049
- Charcoal #264653 ΔE 0.051
- Gunmetal #293241 ΔE 0.054
- Pakistan Green #283618 ΔE 0.055
Use #103F3B 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.