#03515B
Closest named color: Deep Teal (#00555A). oklch(39.9% 0.068 209.3), rgb(3, 81, 91).
Aa
White text reads best on this color (9.00:1).
About this color
#03515B is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.068 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.014 away. White text reads best on it, at 9.00:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #03515B |
| RGB | rgb(3, 81, 91) |
| HSL | hsl(187, 94%, 18%) |
| OKLCH | oklch(39.9% 0.068 209.3) |
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 #03515B | 9.00:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #03515B | 2.33:1 | Fails | Lc 13.7 | Not readable |
| #03515B text on white | 9.00:1 | AAA | Lc 90.2 | Preferred for body text |
| #03515B text on black | 2.33:1 | Fails | Lc -12.1 | 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
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#DFEDEF
oklch(93.6% 0.015 207.1)
-
Step 200
200
#C5DFE3
oklch(88.6% 0.028 207.8)
-
Step 300
300
#9BCAD2
oklch(80.8% 0.05 209.1)
-
Step 400
400
#5EAFBC
oklch(70.8% 0.081 209)
-
Step 500
500
#1B9AAB
oklch(63% 0.104 209.2)
-
Step 600
600
#008292
oklch(55.6% 0.096 209.8)
-
Step 700
700
#006D7B
oklch(49% 0.085 210.2)
-
Step 800
800
#005A65
oklch(42.8% 0.074 209.1)
-
Step 900
900 (this color)
#03515B
oklch(39.9% 0.068 209.3)
-
Step 950
950
#052C32
oklch(27% 0.043 210.1)
#03515B 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) | #484D5C | 0.064 |
| Deuteranopia (no green cones) | #3D465B | 0.057 |
| Tritanopia (no blue cones) | #005654 | 0.023 |
| Achromatopsia (no color) | #494949 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03515B
#03515B
oklch(39.9% 0.068 209.3)
- #673832
#673832
oklch(39.8% 0.068 28.2)
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 #03515B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.014
- Dark Teal #014D4E ΔE 0.023
- Dark Slate Gray #2F4F4F ΔE 0.033
- Dark Blue Green #005249 ΔE 0.033
- Charcoal #264653 ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.041
- Petrol #005F6A ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.066
Use #03515B 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.