#51909E
Closest named color: Dusty Teal (#4C9085). oklch(61.6% 0.068 213.7), rgb(81, 144, 158).
Aa
Black text reads best on this color (5.83:1).
About this color
#51909E is a medium-dark, muted teal or cyan. In OKLCH its lightness is 62%, its chroma 0.068 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Teal (#4C9085), ΔE 0.040 away. Black text reads best on it, at 5.83:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (62%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dusty Teal (#4C9085) |
| Black text | 5.83:1 |
| White text | 3.60:1 |
Values
| HEX | #51909E |
| RGB | rgb(81, 144, 158) |
| HSL | hsl(191, 32%, 47%) |
| OKLCH | oklch(61.6% 0.068 213.7) |
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 #51909E | 3.60:1 | AA large text | Lc -69.0 | Content text, not long reading |
| Black text on #51909E | 5.83:1 | AA | Lc 40.6 | Non-text elements, placeholder text |
| #51909E text on white | 3.60:1 | AA large text | Lc 63.5 | Content text, not long reading |
| #51909E text on black | 5.83:1 | AA | Lc -38.2 | 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
#E3ECEE
oklch(93.7% 0.01 212.5)
-
Step 200
200
#CCDDE0
oklch(88.6% 0.019 209.4)
-
Step 300
300
#A9C7CE
oklch(81% 0.034 213.4)
-
Step 400
400
#7AAAB5
oklch(70.8% 0.053 213.5)
-
Step 500
500 (this color)
#51909E
oklch(61.6% 0.068 213.7)
-
Step 600
600
#387F8E
oklch(55.7% 0.074 213.6)
-
Step 700
700
#296B78
oklch(49.1% 0.069 212.9)
-
Step 800
800
#245762
oklch(42.7% 0.057 214)
-
Step 900
900
#234850
oklch(37.8% 0.044 213.4)
-
Step 950
950
#152A2F
oklch(27% 0.028 214.7)
#51909E 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) | #858C9F | 0.062 |
| Deuteranopia (no green cones) | #79839E | 0.056 |
| Tritanopia (no blue cones) | #289694 | 0.039 |
| Achromatopsia (no color) | #878787 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51909E
#51909E
oklch(61.6% 0.068 213.7)
- #AA766A
#AA766A
oklch(61.6% 0.069 33.5)
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 #51909E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Teal #4C9085 ΔE 0.040
- Sea #3C9992 ΔE 0.040
- Blue Grey #758DA3 ΔE 0.042
- Teal Green #0A9396 ΔE 0.043
- Dusty Blue #5A86AD ΔE 0.043
- Steel #738595 ΔE 0.045
- Cadet Blue #5F9EA0 ΔE 0.045
- Light Slate Gray #778899 ΔE 0.045
Use #51909E 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.