#51939D
Closest named color: Sea (#3C9992). oklch(62.3% 0.069 208.2), rgb(81, 147, 157).
Aa
Black text reads best on this color (6.01:1).
About this color
#51939D is a medium-light, muted teal or cyan. In OKLCH its lightness is 62%, its chroma 0.069 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.033 away. Black text reads best on it, at 6.01:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (62%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.01:1 |
| White text | 3.49:1 |
Values
| HEX | #51939D |
| RGB | rgb(81, 147, 157) |
| HSL | hsl(188, 32%, 47%) |
| OKLCH | oklch(62.3% 0.069 208.2) |
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 #51939D | 3.49:1 | AA large text | Lc -67.8 | Content text, not long reading |
| Black text on #51939D | 6.01:1 | AA | Lc 41.7 | Non-text elements, placeholder text |
| #51939D text on white | 3.49:1 | AA large text | Lc 62.4 | Content text, not long reading |
| #51939D text on black | 6.01:1 | AA | Lc -39.3 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CCDDE0
oklch(88.6% 0.019 209.4)
-
Step 300
300
#A8C7CC
oklch(80.8% 0.034 208.4)
-
Step 400
400
#79AAB2
oklch(70.6% 0.053 208.7)
-
Step 500
500 (this color)
#51939D
oklch(62.3% 0.069 208.2)
-
Step 600
600
#35808A
oklch(55.7% 0.075 207.2)
-
Step 700
700
#266C75
oklch(49.2% 0.07 207.1)
-
Step 800
800
#225860
oklch(42.8% 0.058 208.5)
-
Step 900
900
#21484E
oklch(37.6% 0.045 208.6)
-
Step 950
950
#152A2E
oklch(26.9% 0.028 211.1)
#51939D 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) | #898E9E | 0.067 |
| Deuteranopia (no green cones) | #7D859D | 0.062 |
| Tritanopia (no blue cones) | #279896 | 0.035 |
| Achromatopsia (no color) | #898989 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51939D
#51939D
oklch(62.3% 0.069 208.2)
- #AD7770
#AD7770
oklch(62.3% 0.069 27.4)
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 #51939D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.033
- Cadet Blue #5F9EA0 ΔE 0.036
- Dusty Teal #4C9085 ΔE 0.037
- Teal Green #0A9396 ΔE 0.041
- Grey Teal #5E9B8A ΔE 0.045
- Blue Grey #758DA3 ΔE 0.045
- Dull Teal #5F9E8F ΔE 0.047
- Light Slate Gray #778899 ΔE 0.049
Use #51939D 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.