#10434E
Closest named color: Charcoal (#264653). oklch(35.5% 0.055 215.4), rgb(16, 67, 78).
Aa
White text reads best on this color (10.85:1).
About this color
#10434E is a dark, muted teal or cyan. In OKLCH its lightness is 36%, its chroma 0.055 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.025 away. White text reads best on it, at 10.85:1.
| Hue family | Teals and cyans |
| Lightness | dark (36%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.93:1 |
| White text | 10.85:1 |
Values
| HEX | #10434E |
| RGB | rgb(16, 67, 78) |
| HSL | hsl(191, 66%, 18%) |
| OKLCH | oklch(35.5% 0.055 215.4) |
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 #10434E | 10.85:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #10434E | 1.93:1 | Fails | Lc 9.0 | Not readable |
| #10434E text on white | 10.85:1 | AAA | Lc 94.9 | Preferred for body text |
| #10434E text on black | 1.93:1 | Fails | Lc -7.7 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C9DDE3
oklch(88.4% 0.023 217.7)
-
Step 300
300
#A3C8D2
oklch(80.9% 0.042 216)
-
Step 400
400
#6FABBB
oklch(70.6% 0.066 216.5)
-
Step 500
500
#4496AA
oklch(63% 0.084 216.2)
-
Step 600
600
#1B8095
oklch(55.5% 0.092 215.8)
-
Step 700
700
#066C7F
oklch(49% 0.085 215.8)
-
Step 800
800
#0F5867
oklch(42.6% 0.07 215.7)
-
Step 900
900 (this color)
#10434E
oklch(35.5% 0.055 215.4)
-
Step 950
950
#102B31
oklch(27.1% 0.034 214.3)
#10434E 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) | #3B414F | 0.048 |
| Deuteranopia (no green cones) | #333A4E | 0.045 |
| Tritanopia (no blue cones) | #004746 | 0.024 |
| Achromatopsia (no color) | #3D3D3D | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10434E
#10434E
oklch(35.5% 0.055 215.4)
- #553128
#553128
oklch(35.6% 0.055 34.8)
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 #10434E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.025
- Dark Blue Grey #1F3B4D ΔE 0.028
- Midnight Green #073B4C ΔE 0.028
- Dark Teal #014D4E ΔE 0.034
- Dark Grey Blue #29465B ΔE 0.035
- Onyx #343A40 ΔE 0.046
- Charcoal Grey #3C4142 ΔE 0.051
- Dark Slate Gray #2F4F4F ΔE 0.053
Use #10434E 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.