#10556B
Closest named color: Deep Teal (#00555A). oklch(42% 0.073 225), rgb(16, 85, 107).
Aa
White text reads best on this color (8.28:1).
About this color
#10556B is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 42%, its chroma 0.073 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.031 away. White text reads best on it, at 8.28:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.53:1 |
| White text | 8.28:1 |
Values
| HEX | #10556B |
| RGB | rgb(16, 85, 107) |
| HSL | hsl(195, 74%, 24%) |
| OKLCH | oklch(42% 0.073 225) |
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 #10556B | 8.28:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #10556B | 2.53:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #10556B text on white | 8.28:1 | AAA | Lc 88.3 | Fine for body text |
| #10556B text on black | 2.53:1 | Fails | Lc -13.9 | 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 800.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#C9DDE5
oklch(88.5% 0.024 223.7)
-
Step 300
300
#A4C7D6
oklch(80.9% 0.043 225.7)
-
Step 400
400
#70AAC1
oklch(70.7% 0.069 225)
-
Step 500
500
#4695B1
oklch(63.2% 0.088 224.1)
-
Step 600
600
#217F9D
oklch(55.7% 0.095 224.4)
-
Step 700
700
#106B86
oklch(49.2% 0.088 224.3)
-
Step 800
800 (this color)
#10556B
oklch(42% 0.073 225)
-
Step 900
900
#194858
oklch(37.7% 0.057 224)
-
Step 950
950
#102A34
oklch(27% 0.037 225.8)
#10556B 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) | #49536C | 0.056 |
| Deuteranopia (no green cones) | #3D4B6B | 0.048 |
| Tritanopia (no blue cones) | #005C5C | 0.040 |
| Achromatopsia (no color) | #4E4E4E | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10556B
#10556B
oklch(42% 0.073 225)
- #6E3F2A
#6E3F2A
oklch(42% 0.074 44.4)
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 #10556B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.031
- Petrol #005F6A ΔE 0.033
- Deep Sea Blue #015482 ΔE 0.040
- Dark Slate Gray #2F4F4F ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.048
- Light Navy #155084 ΔE 0.049
- Dark Teal #014D4E ΔE 0.052
- YInMn Blue #415A77 ΔE 0.053
Use #10556B 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.